Updated NestedAttributes patch (was NestedParams) and AttributeDecorator

Hi listees,

Now that the 2.2 craze is gone, I thought I'd update my patches for the current codebase.
Otherwise you guys have nothing to do… :wink:

The first patch is our take on a composed_of replacement:
http://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/950-attributedecorator-a-new-take-on-aggregation

The second patch is a :accessible replacement:
http://rails.lighthouseapp.com/projects/8994/tickets/1202-add-attributes-writer-method-for-an-association
(See the last comment about recent changes.)

Cheers,
Eloy